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i2c-nomadik: fixup bus delays 

We were missing a transfer delay in one execution path leading to
hangs and the bus timeout was too low leading to errors under
stress tests.

Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Linus Walleij 2010-09-23 09:04:11 +02:00 committed by Ben Dooks
parent 5680bc6ec7
commit f868fc355a
1 changed files with 6 additions and 2 deletions
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8
drivers/i2c/busses/i2c-nomadik.c
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@ -103,6 +103,9 @@
/* maximum threshold value */
#define MAX_I2C_FIFO_THRESHOLD 15
/* per-transfer delay, required for the hardware to stabilize */
#define I2C_DELAY 150
enum i2c_status {
I2C_NOP,
I2C_ON_GOING,
@ -118,7 +121,7 @@ enum i2c_operation {
};
/* controller response timeout in ms */
#define I2C_TIMEOUT_MS 500
#define I2C_TIMEOUT_MS 2000
/**
* struct i2c_nmk_client - client specific data
@ -267,6 +270,7 @@ static int init_hw(struct nmk_i2c_dev *dev)
clk_disable(dev->clk);
udelay(I2C_DELAY);
return 0;
}
@ -599,7 +603,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
clk_disable(dev->clk);
return status;
}
mdelay(1);
udelay(I2C_DELAY);
}
clk_disable(dev->clk);